I just got this jeep today, knowing it had some sort of engine problem, I was told it was the carburetor. It's not the original engine and a lot of things are mickey moused. It had a little bit of old gas in it, so we put some new gas in, and it ran a better. We suspect it might be a fuel filter problem, or it may actually be the carburetor as we were told. I was just wondering what everyone else thought the problem may be, as my dad and I have limited mechanical experience.
The EGR valve helped a little, still some hesitation and stalling. We're beginning to look at the fuel pump. One of the PO's installed an electric fuel pump, and we suspect it might not be doing enough, causing the engine to idle fine but stall out when accelerating. Does anyone know what PSI and GPH the stock Carter BBD carb needs? I haven't been able to find it anywhere.
Also sorry for all the double posts.
EDIT: We discovered that the fuel pressure should be between 4-5 PSI. The pump the PO installed is 2.5-4.5 PSI. Is this enough, or would we need a slightly higher PSI rating?
Last edited by Lunchbox2011; 12-14-2008 at 12:53 PM..
with a clean fuel filter, that might be enough fuel pressure. Is your jeep stock, with all the emissions junk on there? If so, This link is a great resource for troubleshooting http://home.sprynet.com/~dale02/list.htm If it has been modified, It would help greatly to know what mods have been done, or what emissions equipment has been bypassed. My personal recommendation would be for you to bypass the emissions and ECU, and swap out the carter carb for a weber or an MC2100. Also, The engine driven pump for your jeep is already set up for the correct fuel pressure, and they only cost about 20 bucks. You might want to get rid of the electric pump and reinstall a mechanical one
See that you are in the new egland states you have to pass emissions up there some off the repairs would require you to change the emissions controls. Which is a no go for you (sorry check your with the local testing center what they will let you do or not) If they just tail pipe sniff then you can do alot to get pass them. I they have under the hood inspections then that is a new story. That would be a starting point. You could do what is called a "nutter bypass" just hide the wires that is done in the bypass.